Improvement in grain-separators



2 Shets-Sheet 1.

E. F. OSBORNE. GRAIN-SEPARATOR.

Patented A ril 3, 1877'.

No.189,Z55.

2 SheetsSheet Z.'

E. F. OSBORNE.

, GRAIN-SEPARATUR. Nol189,255. Patented April 3, 1877.

NZPETERSLPHOTUUTHBMAEHER. wis'nmmpwb. c:-

STATES "PATENT OFFICE.

EUGENE F. OSBORNE, OF ST. PAUL, MINNESOTA, ASSIGNOR TO JOHN H. ELWARD,OF SAME PLACE.

IMPROVEMENT IN GRAIN-SEPARATORS.

Specification forming part of Letters Patent No. I 89,255, dated April3, 1877 application filed J une 28, 1876.

To all whom it may concern:

Be it known that I, EUGENE F. OSBORNE, of St. Paul, in the county ofRamsey and State of Minnesota, have invented certain new and usefulImprovements in Thrashing-Machines, of which the following is aspecification:

In the drawing, Figure 1 represents a side elevation of my apparatus,and Fig. 2 a central longitudinal section of the same. y

The letter A represents the chamber or casing of the machine, B thethrashing-cylinder, and O the beater, constructed in the ordinary mannerand driven by suitable belts and pulleys. D represents the reciprocatingstrawrack, provided with two pins or projections, E E, on oppositesides, setting in slots in the disks F E, which support and serve togive a reciprocating motion to said straw-rack, said disks being mountedon opposite sides of the transverse rock-shafts G G, one of whichcarries on its extreme outer end a wheel and crank, H, connected bymeans of a rod, I, with a wheel and crank, K, on the end of therevolving shaft L, over which one end of the band or traveling-apron Mpasses. The belt is mounted upon rollers M and M the roller M beingmounted in movable bearing-blocks N, which are attached to the rods 0,the latter passing through the frame of the apparatus and being providedwith the screw-nuts P and spiral springs It, by means of which thetension of the belt is automatically adjusted, the wrinkling andcatching of the belt obviated, and the even delivery promoted. The saidbelt M is provided with a welt or rib, N, on each side, and travels atone end over the shaft L, before mentioned, and at the other over asimilarly-constructed shaft, L, both of said shafts passing transverselyacross the machine, and be ing journaled in opposite sides thereof. Theletter 0 represents a series of confiningguards, secured to oppositesides of the frame A, on the inside, in such position as to, fall orproject over the ribs or welts on the traveling band or belt, andconfine the grain thereon in such manner that the whole of the grainwill be carried forward to the winnowingsieve P, at the forward end ofsaid belt. The letter Q represents a grain-table, located and supportedin any suitable manner just below the upper side of the traveling bandor apron, its object being to support the same. The

letter I represents the winnowing-sieve, supported by depending straps Sat each side,

and provided with segmental slotted braces T, in the slots of which setand Work the projecting pins U, attached to the disks and the rearrock-shaft, which supports the strawrackat one end. Below and just infront of the winnowing-sieve is located a fan-chamber v, provided withan ordinary rotary fan, W, driven by a pulley at one end, through themedium of a belt, which gives motion to the beater andthrashing-cylinder. The upper part of the fan-case is turned upward andforward, as at c, to form a chuteboard or scraper, to receive the grainfrom the apron M, and guide the same to the winnowersieve P. The letterA represents a transverse trough, provided with a propelling-screw,0perated bya pulley and belt, in connection with the other working partsof the apparatus, the object of which is to carry off those portions ofthe grain falling through the sieve, which are carried down to saidtrough by the inclined partition B. The letter 0 represents a similartransverse trough and propelling-screw, located directly under the rearend of the winnowing-sieve, for carrying the grain passing over the endof said sieve to its proper receptacle.

' Instead of constructing the endless belt with a canvas bottom, thesame may be formed of parallel bands of leather or other flexiblematerial, to which are secured transverse slats or laths at suitabledistances apart, the said bands traveling over pulleys located in thesame relative position to the bands as the grooved parts of the rollersto the welt on the belt, as above set forth, the bands serving in theplace of the welts, to keep the grain on the table, and the slats orlaths serving the purpose of carriers to convey the grain along thesurface of the table.

What I claim, and desire to secure by Letters Patent, is-

In combination .with the scraper c, the grainbelt M, provided with anautomaticallyadjustable tension device, substantially as and for thepurposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of the subscribing witnesses.

Witnesses: E. F. OSBORNE.

WM. S. MOORE, L. O. HAUSER.

